| /* |
| (C) Copyright IBM Corp. 2008 |
| |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| * Neither the name of IBM nor the names of its contributors may be |
| used to endorse or promote products derived from this software without |
| specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* SPU timer stop library service. */ |
| #include <spu_timer.h> |
| #include "spu_timer_internal.h" |
| |
| /* Stop a timer. Moves it from either the active or handled list to the |
| stopped list. Returns 0 on sucess, timer was successfully stopped. |
| Returns <0 - Failure: |
| * SPU_TIMER_ERR_NOT_ACTIVE - timer was not active |
| * SPU_TIMER_ERR_INVALID_ID - invalid timer id |
| * SPU_TIMER_ERR_NOCLOCK - spu clock is not running */ |
| int |
| spu_timer_stop (int id) |
| { |
| spu_timer_t *t, **pn; |
| unsigned was_enabled; |
| |
| if (id < 0 || id >= SPU_TIMER_NTIMERS) |
| return SPU_TIMER_ERR_INVALID_ID; |
| |
| if (__spu_clock_startcnt == 0) |
| return SPU_TIMER_ERR_NOCLOCK; |
| |
| |
| /* Free or stopped states. */ |
| if (__spu_timers[id].state == SPU_TIMER_ACTIVE || |
| __spu_timers[id].state == SPU_TIMER_HANDLED) |
| { |
| was_enabled = spu_readch (SPU_RdMachStat) & 0x1; |
| spu_idisable (); |
| |
| /* Timer is on either active list or handled list. */ |
| t = (__spu_timers[id].state == SPU_TIMER_ACTIVE) |
| ? __spu_timers_active : __spu_timers_handled; |
| |
| pn = (__spu_timers[id].state == SPU_TIMER_ACTIVE) |
| ? &__spu_timers_active : &__spu_timers_handled; |
| |
| while (t && t->id != id) |
| { |
| pn = &t->next; |
| t = t->next; |
| } |
| #ifdef SPU_TIMER_DEBUG |
| if (!t) |
| ABORT (); /* Internal error. */ |
| #endif |
| /* Fix timeout of next timer and decrementer if we were at the head of |
| the active list. */ |
| if (t->next) |
| { |
| t->next->tmout += t->tmout; |
| if (__spu_timers_active == t) |
| __reset_spu_decr (t->next->tmout); |
| } |
| else |
| __reset_spu_decr (CLOCK_START_VALUE); |
| |
| *pn = t->next; /* Update this elements to pointer. */ |
| t->next = __spu_timers_stopped; |
| __spu_timers_stopped = t; |
| |
| __spu_timers[id].state = SPU_TIMER_STOPPED; |
| |
| if (__likely (was_enabled)) |
| spu_ienable (); |
| |
| return 0; |
| } |
| |
| return SPU_TIMER_ERR_NOT_ACTIVE; |
| } |